// if (window.Event) {
//       document.captureEvents(Event.MOUSEUP);
//     }

    function nocontextmenu() {
      event.cancelBubble = true
      event.returnValue = false;
      return false;
    }

    function norightclick(e) {
      if (window.Event) {
        if (e.which == 2 || e.which == 3)
          return false;
      } else if (event.button == 2 || event.button == 3) {
        event.cancelBubble = true
        event.returnValue = false;
        return false;
      }
    }
    document.oncontextmenu = nocontextmenu; // for IE5+
    document.onmousedown = norightclick; // for all others


    document.onkeydown=function(){
        if(event.ctrlKey && window.event.keyCode==67){
              event.returnValue=false;
              alert("Ctrl+C被禁止啦！");
        }
        if (event.ctrlKey && window.event.keyCode==86){	//禁用ctrl + v 功能
             event.returnValue=false;
             alert("Ctrl+V被禁止啦！");
        }
    }
    // document.onmousedown=function(){
    //     if(event.button==2){
    //         event.returnValue=false;
    //         alert("右键被禁止啦！");
    //     }
    // }
